Intermediate Half Marathon Training Plan
You have finished a half marathon. Now you want to run a faster one. This 12-week plan uses tempo runs, intervals, and race pace work to take you from 30 to 39 miles per week and get you to the start line ready to PR.
Are You Ready for This Plan?
This plan is not for first-timers. It assumes you have a running base and want to get faster. Check these boxes before starting:
You can run 8 or more miles comfortably on a weekend long run
You currently run 4 to 5 days per week (25 to 35 miles per week)
You have completed at least one half marathon or race of 10 miles or longer
You have a recent race time to base your pace zones on (5K, 10K, or half)
You have been running consistently for at least 6 months
If you cannot check all of these, start with our 12-week beginner half marathon plan instead. There is no shame in building a stronger base first.
Your Pace Zones by Target Time
Every workout in this plan references a pace zone. Find your goal time below and use these paces for each workout type. Getting your paces right is the single most important factor in this plan.
Race Pace
8:00/mi
Easy Runs
9:15 to 9:45/mi
Tempo Runs
7:30 to 7:45/mi
Intervals (5K Pace)
6:50 to 7:10/mi
Race Pace
8:23/mi
Easy Runs
9:30 to 10:00/mi
Tempo Runs
7:50 to 8:05/mi
Intervals (5K Pace)
7:10 to 7:30/mi
Race Pace
9:09/mi
Easy Runs
10:15 to 10:45/mi
Tempo Runs
8:35 to 8:50/mi
Intervals (5K Pace)
7:50 to 8:10/mi
Use our training pace calculator for personalized paces based on a recent race result.
Weekly Mileage Progression
Mileage builds from 28 to 39 miles per week with recovery weeks at weeks 4 and 8. The 2-week taper brings you to the start line fresh.
Key Workouts Explained
Tempo Run
A sustained effort at "comfortably hard" pace for 3 to 6 miles. Tempo runs improve your lactate threshold, which is the pace at which fatigue begins accumulating. For an intermediate runner, tempo pace is about 15 to 20 seconds per mile faster than half marathon goal pace. You should be able to speak in short phrases but not hold a conversation.
Pace: Half marathon pace minus 15 to 20 seconds per mile
Intervals (800m to 1000m)
Fast repeats with recovery jogs between sets. Intervals improve VO2max, speed, and running economy. Run each repeat at approximately your current 5K race pace. Recovery jog between repeats should be 50 to 90 seconds at an easy shuffle. The total volume of fast running builds week over week.
Pace: At or slightly faster than your current 5K pace
Race Pace Long Run
The long run is the most important run of the week. In this plan, several long runs end with race pace miles. For example, "12 mi w/ last 3 at race pace" means run 9 miles easy, then run the final 3 miles at your goal half marathon pace. This teaches your body to run fast on tired legs, which is exactly what race day demands.
Pace: Start easy (60 to 90 sec slower than race pace), finish at goal race pace
Easy Run
The foundation of your training. Two easy runs per week keep your mileage up without adding fatigue. Run at a pace where you can hold a full conversation. These runs build aerobic base, promote recovery, and should feel genuinely easy. About 60 to 70% of your total mileage should be at easy pace.
Pace: 60 to 90 seconds per mile slower than goal half marathon pace
The Full 12-Week Schedule
Five runs per week: 2 easy, 1 tempo or interval (alternating), 1 race pace long run, and 1 additional easy run. Recovery weeks at weeks 4 and 8 reduce volume by 35 to 40 percent. Cross-training on Sundays is optional but recommended.
Long Run Strategies
Progressive Long Run
Start 60 to 90 seconds per mile slower than race pace and gradually increase speed so the last 2 to 4 miles are at goal race pace. This teaches your body to run fast when tired, which is the exact skill you need for miles 10 to 13 on race day.
Example (sub-1:50 goal): Miles 1 to 8 at 9:30 to 10:00/mi. Miles 9 to 12 at 8:23/mi.
Race Simulation
Once during weeks 7 to 9, do a full race simulation: wake up at race time, eat your planned race breakfast, warm up, and run 10 to 12 miles at goal race pace. This rehearsal eliminates surprises on race day and builds massive confidence.
Tip: Practice your exact fueling strategy during this run.
The 2-Week Taper
The taper converts your training into race-day fitness. You reduce volume but maintain intensity. Your body repairs muscle damage, replenishes glycogen, and arrives at the start line fully loaded.
Week 11: Pre-Taper
Reduce total mileage by 25 to 30%
Keep one short tempo session (3 miles)
Long run drops to 9 miles (all easy)
Sleep 8+ hours every night
Begin carb-loading: increase carbs by 20%
Week 12: Race Week
Reduce mileage by 65 to 70% from peak
Only 3 short runs before race day
4x400m strides on Wednesday to stay sharp
No hard efforts after Wednesday
Rest completely on Friday
Focus on sleep, hydration, and race prep
Race Day Execution: Mile by Mile
The intermediate strategy is a controlled negative split. Run the first half slightly conservative, then race the second half. Here is the mile-by-mile playbook:
Miles 1 to 2
Settle in
Run 10 to 15 seconds per mile slower than goal pace. The crowd and adrenaline will tempt you to go fast. Resist. These miles are an investment.
Miles 3 to 6
Lock in goal pace
Gradually bring your pace to goal race pace by mile 3 and hold it steady. Check your watch every mile. If you are faster than goal pace, slow down slightly.
Miles 7 to 9
Stay patient
This is the most mentally challenging stretch. You feel strong and want to push. Do not. Maintain goal pace. The race has not started yet.
Miles 10 to 11
Start racing
If you feel good, begin picking up the pace by 5 to 10 seconds per mile. This is where all those race pace long runs pay off. Your body knows this feeling.
Miles 12 to 13.1
Give everything
This is what you trained for. Run the last 1.1 miles as hard as you can sustain. Use the crowd energy. Pick off runners ahead of you. Leave nothing in the tank.
Use our race pace calculator to plan exact splits, and print our race day checklist so you do not forget anything.
About This Intermediate Half Marathon Plan
This is a free 12-week intermediate half marathon training plan published by Motera, a gamified running app for iOS. The plan is designed for runners who can already run 8 or more miles, train 4 to 5 days per week, and want to run a faster half marathon. It targets finish times between 1:45 and 2:00. The plan includes 5 runs per week: 2 easy runs, 1 tempo or interval session (alternating weekly), and 1 long run that progressively includes race pace miles. Weekly mileage builds from 28 to 39 miles with recovery weeks at weeks 4 and 8.
The plan follows standard periodization principles: build volume with quality sessions, include recovery weeks every 3 to 4 weeks, peak 3 weeks before race day, and taper for 2 weeks. Prerequisites include the ability to run 8 miles comfortably, at least 6 months of consistent running, and a recent race time to establish pace zones.
Make Easy Miles Fun Again
Intermediate training means a lot of easy miles. Motera makes those miles exciting by turning every run into a territory capture mission. Run loops to claim zones on a real map, explore new routes through Fog of War, and compete on leaderboards.
Instead of dreading your Tuesday 5-miler, you will be strategically expanding your territory. Motera adds purpose to the runs that are supposed to be easy but often feel boring.
MoteraFrequently Asked Questions
Am I ready for an intermediate half marathon plan?
You are ready for this plan if you can run 8 or more miles comfortably, you run 4 to 5 days per week consistently, you have a recent race time (5K, 10K, or half marathon), and you have been running regularly for at least 6 months. If you cannot check all of these boxes, start with a beginner or first-timer plan instead.
How is this different from a beginner half marathon plan?
A beginner plan focuses on just finishing the distance with 3 to 4 easy runs per week. This intermediate plan assumes you can already cover the distance and focuses on running it faster. It includes 5 runs per week with dedicated tempo, interval, and race pace sessions in addition to easy runs and a long run.
What pace should my easy runs be?
Easy runs should be 60 to 90 seconds per mile slower than your goal half marathon pace. For a sub-1:50 goal (8:23/mi race pace), your easy runs should be around 9:30 to 10:00 per mile. If you cannot hold a conversation, you are going too fast. Most runners do their easy runs way too fast.
Can I skip the interval sessions and just do tempo runs?
You can, but your improvement will be limited. Tempo runs improve your lactate threshold (the pace you can sustain). Intervals improve your VO2max and running economy (how efficient you are). Both adaptations contribute to a faster half marathon. Dropping one limits your ceiling.
How should I handle the taper if I feel like I am losing fitness?
You are not losing fitness. Research shows that aerobic fitness is maintained for 2 to 3 weeks even with a 40 to 50 percent reduction in volume. What you are gaining during the taper is freshness: replenished glycogen stores, repaired micro-damage, and a rested nervous system. Trust the taper. It works.
What if I miss a week due to illness?
If you miss less than a week, skip the missed workouts and continue with the schedule. Do not try to make up missed runs. If you miss more than a week, drop back one week in the plan. If you miss two or more weeks, reassess your goal time. Arriving at the start line healthy is more important than hitting every workout.
Should I do a tune-up race during this plan?
A 10K race in weeks 4 to 6 is an excellent idea. It gives you a current fitness benchmark, practice racing, and a confidence boost. Replace that weeks interval session with the race. Take an easy day before and after the race.
What heart rate zone should my tempo runs be in?
Tempo runs should be at zone 3 to low zone 4, roughly 80 to 88 percent of your maximum heart rate. You should be able to speak in short sentences but not carry a full conversation. If you are gasping, you have crossed from tempo into interval territory. Dial it back.
